A new secret key agreement scheme in a four-terminal network

Author

Babaheidarian, Parisa ; Salimi, Somayeh ; Aref, Mohammad Reza

Author_Institution

Dept. of Electr. Eng., Sharif Univ. of Technol., Tehran, Iran

fYear

2011

fDate

17-20 May 2011

Firstpage

151

Lastpage

154

Abstract

A new scenario for simultaneously generating a secret key and two private keys among three Terminals in the presence of an external eavesdropper is considered. Terminals 1, 2 and 3 intend to share a common secret key concealed from the external eavesdropper (Terminal 4) and simultaneously, each of Terminals 1 and 2 intends to share a private key with Terminal 3 while keeping it concealed from each other and from Terminal 4. All four Terminals observe i.i.d. outputs of correlated sources and there is a public channel from Terminal 3 to Terminals 1 and 2. An inner bound of the “secret key-private keys capacity region” is derived and the single letter capacity regions are obtained for some special cases.

Keywords

private key cryptography; external eavesdropper; four-terminal network; public channel; secret key agreement scheme; secret key-private keys capacity region; single letter capacity region; Channel capacity; Equations; Markov processes; Mathematical model; Random variables; Security; information-theoretic security; secret key-private keys capacity region; source model secret key sharing;

fLanguage

English

Publisher

ieee

Conference_Titel

Information Theory (CWIT), 2011 12th Canadian Workshop on

Conference_Location

Kelowna, BC

Print_ISBN

978-1-4577-0743-8

Type

conf

DOI

10.1109/CWIT.2011.5872145

Filename

5872145